Stocks
AMT American Tower Corp /Ma/

AMT

American Tower Corp /Ma/

Company with tickers: AMT

CIK

1053507

CUSIP

03027X100

Shares Outstanding

465,893,069

Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-05-20	HORMATS ROBERT D	Director	Other	9,597	—	—	9,597
2026-04-29	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Sell	416	$177.54	$73,857	29,461
2026-04-28	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Sell	556	$178.48	$99,235	29,877
2026-04-27	Blanchett Paul	Chief Accounting Officer	Other	0	—	—	0
2026-03-11	Meyer Robert Joseph	SVP & Chief Accounting Officer	Tax	684	$182.85	$125,069	26,439
2026-03-11	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Tax	863	$182.85	$157,800	30,433
2026-03-11	Noel Eugene M	EVP & Chief Operating Officer	Tax	719	$182.85	$131,469	34,542
2026-03-11	Vondran Steven O	Director, President and CEO	Tax	2,158	$182.85	$394,590	108,902
2026-03-11	Rossi Richard C	EVP & President, U.S. Tower	Tax	684	$182.85	$125,069	17,518
2026-03-11	Font Juan	SVP, Pres. & CEO, CoreSite	Tax	928	$182.85	$169,685	28,352
2026-03-11	Smith Rodney M	EVP, CFO & Treasurer	Tax	1,295	$182.85	$236,791	92,542
2026-03-10	Meyer Robert Joseph	SVP & Chief Accounting Officer	Tax	1,368	$186.12	$254,612	27,123
2026-03-10	Meyer Robert Joseph	SVP & Chief Accounting Officer	Award	4,030	—	—	28,491
2026-03-10	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Tax	6,629	$186.12	$1,233,789	31,296
2026-03-10	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Award	6,878	—	—	37,925
2026-03-10	Noel Eugene M	EVP & Chief Operating Officer	Award	8,167	—	—	37,759
2026-03-10	Noel Eugene M	EVP & Chief Operating Officer	Tax	2,498	$186.12	$464,928	35,261
2026-03-10	Vondran Steven O	Director, President and CEO	Tax	15,269	$186.12	$2,841,866	111,060
2026-03-10	Vondran Steven O	Director, President and CEO	Award	20,955	—	—	126,329
2026-03-10	Chambliss Kelly C	Director	Award	1,209	—	—	4,426
2026-03-10	MACNAB CRAIG	Director	Award	1,209	—	—	15,315
2026-03-10	Kalathur Rajesh	President, JD Financial & CIO	Other	171	—	—	171
2026-03-10	Kalathur Rajesh	President, JD Financial & CIO	Buy	2,671	$185.30	$494,936	4,936
2026-03-10	Kalathur Rajesh	President, JD Financial & CIO	Award	1,209	—	—	2,265
2026-03-10	HORMATS ROBERT D	Director	Award	1,209	—	—	9,597
2026-03-10	Clarke Teresa Hillary	Director	Award	1,209	—	—	5,307
2026-03-10	REEVE PAMELA D A	Director	Award	1,209	—	—	21,899
2026-03-10	REILLY EUGENE F	Vice Chairman	Award	1,209	—	—	6,898
2026-03-10	Lieblein Grace	Director	Award	1,209	—	—	9,141
2026-03-10	Frank Kenneth R	Director	Award	1,209	—	—	6,188
2026-03-10	Rossi Richard C	EVP & President, U.S. Tower	Tax	1,544	$186.12	$287,369	18,202
2026-03-10	Rossi Richard C	EVP & President, U.S. Tower	Award	6,448	—	—	19,746
2026-03-10	Font Juan	SVP, Pres. & CEO, CoreSite	Tax	1,834	$186.12	$341,344	29,280
2026-03-10	Font Juan	SVP, Pres. & CEO, CoreSite	Award	8,060	—	—	31,114
2026-03-10	Smith Rodney M	EVP, CFO & Treasurer	Tax	12,433	$186.12	$2,314,030	93,837
2026-03-10	Smith Rodney M	EVP, CFO & Treasurer	Award	10,531	—	—	106,270
2026-03-10	Ray Neville R	President, Technology	Award	1,209	—	—	2,265
2026-03-10	Tanner Bruce L	Director	Award	1,209	—	—	6,940
2026-03-04	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Sell	682	$188.51	$128,564	31,047
2026-03-04	Vondran Steven O	Director, President and CEO	Convert	33,482	$94.71	$3,171,080	138,856
2026-03-04	Vondran Steven O	Director, President and CEO	Sell	16,625	$188.82	$3,139,133	107,147
2026-03-04	Vondran Steven O	Director, President and CEO	Sell	15,084	$187.90	$2,834,284	123,772
2026-03-04	Vondran Steven O	Director, President and CEO	Sell	1,773	$189.82	$336,551	105,374
2026-03-04	Vondran Steven O	Director, President and CEO	Convert	33,482	—	—	0
2026-03-02	Noel Eugene M	EVP & Chief Operating Officer	Sell	6,985	$192.03	$1,341,330	29,592
2026-03-02	Noel Eugene M	EVP & Chief Operating Officer	Sell	21,604	$191.40	$4,135,006	36,577
2026-03-02	Noel Eugene M	EVP & Chief Operating Officer	Convert	41,209	$94.71	$3,902,904	70,801
2026-03-02	Noel Eugene M	EVP & Chief Operating Officer	Convert	41,209	—	—	0
2026-03-02	Noel Eugene M	EVP & Chief Operating Officer	Sell	7,378	$190.29	$1,403,960	58,181
2026-03-02	Noel Eugene M	EVP & Chief Operating Officer	Sell	5,242	$189.36	$992,625	65,559
2026-02-27	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Sell	656	$186.16	$122,121	31,729
2026-02-27	Meyer Robert Joseph	SVP & Chief Accounting Officer	Sell	4,454	$186.73	$831,695	24,461
2026-02-25	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Award	11,083	—	—	32,385
2026-02-25	Smith Rodney M	EVP, CFO & Treasurer	Award	21,425	—	—	95,739
2026-02-25	Vondran Steven O	Director, President and CEO	Award	24,626	—	—	105,374
2026-02-17	Smith Rodney M	EVP, CFO & Treasurer	Sell	1	$193.13	$193	74,314
2026-02-17	Smith Rodney M	EVP, CFO & Treasurer	Sell	22,658	$192.49	$4,361,438	74,315
2026-02-17	Smith Rodney M	EVP, CFO & Treasurer	Sell	2,086	$190.35	$397,070	106,569
2026-02-17	Smith Rodney M	EVP, CFO & Treasurer	Convert	34,341	—	—	0
2026-02-17	Smith Rodney M	EVP, CFO & Treasurer	Convert	34,341	$94.71	$3,252,436	108,655
2026-02-17	Smith Rodney M	EVP, CFO & Treasurer	Sell	9,596	$191.52	$1,837,826	96,973
2026-01-03	Font Juan	SVP, Pres. & CEO, CoreSite	Tax	419	$174.80	$73,241	23,054
2026-01-02	Puech Olivier	Insider	Other	38,144	—	—	38,144
2025-10-31	REILLY EUGENE F	Vice Chairman	Buy	5,554	$178.99	$994,110	5,689
2025-10-01	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Tax	55	$193.32	$10,633	21,262
2025-09-19	REILLY EUGENE F	Vice Chairman	Expiration	1	—	—	0
2025-09-19	REILLY EUGENE F	Vice Chairman	Other	135	—	—	135
2025-08-22	REILLY EUGENE F	Vice Chairman	Other	135	—	—	135
2025-08-22	REILLY EUGENE F	Vice Chairman	Other	0	—	—	0
2025-07-31	Font Juan	SVP, Pres. & CEO, CoreSite	Sell	720	$208.33	$149,998	23,425
2025-06-01	Meyer Robert Joseph	SVP & Chief Accounting Officer	Tax	162	$214.65	$34,773	28,794
2025-05-14	REED JOANN A	Director	Other	62,940	—	—	62,940
2025-03-31	Goel Sanjay	Insider	Other	25,408	—	—	25,408
2025-03-17	Goel Sanjay	Insider	Sell	4,000	$215.92	$863,680	25,408
2025-03-11	Smith Rodney M	EVP, CFO & Treasurer	Tax	1,358	$209.78	$284,881	74,195
2025-03-11	Rossi Richard C	EVP & President, U.S. Tower	Tax	717	$209.78	$150,412	13,178
2025-03-11	Vondran Steven O	Director, President and CEO	Tax	2,262	$209.78	$474,522	80,748
2025-03-11	Puech Olivier	Insider	Tax	1,209	$209.78	$253,624	38,023
2025-03-11	Noel Eugene M	EVP & Chief Operating Officer	Tax	755	$209.78	$158,384	29,473
2025-03-11	Meyer Robert Joseph	SVP & Chief Accounting Officer	Tax	717	$209.78	$150,412	28,956
2025-03-11	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Tax	905	$209.78	$189,851	21,282
2025-03-11	Font Juan	SVP, Pres. & CEO, CoreSite	Tax	981	$209.78	$205,794	24,104
2025-03-10	Smith Rodney M	EVP, CFO & Treasurer	Award	8,448	—	—	83,767
2025-03-10	Smith Rodney M	EVP, CFO & Treasurer	Tax	8,214	$213.07	$1,750,157	75,553
2025-03-10	Rossi Richard C	EVP & President, U.S. Tower	Award	3,755	—	—	14,929
2025-03-10	Rossi Richard C	EVP & President, U.S. Tower	Tax	1,034	$213.07	$220,314	13,895
2025-03-10	Vondran Steven O	Director, President and CEO	Award	15,488	—	—	93,337
2025-03-10	Vondran Steven O	Director, President and CEO	Tax	10,327	$213.07	$2,200,374	83,010
2025-03-10	Puech Olivier	Insider	Tax	7,991	$213.07	$1,702,642	39,232
2025-03-10	Puech Olivier	Insider	Award	8,448	—	—	47,223
2025-03-10	Noel Eugene M	EVP & Chief Operating Officer	Award	5,632	—	—	32,375
2025-03-10	Noel Eugene M	EVP & Chief Operating Officer	Tax	2,147	$213.07	$457,461	30,228
2025-03-10	Meyer Robert Joseph	SVP & Chief Accounting Officer	Award	4,694	—	—	30,904
2025-03-10	Meyer Robert Joseph	SVP & Chief Accounting Officer	Tax	1,231	$213.07	$262,289	29,673
2025-03-10	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Award	6,008	—	—	23,598
2025-03-10	Dowling Ruth T	EVP, Chief Admin Ofr, GC & Sec	Tax	1,411	$213.07	$300,642	22,187
2025-03-10	REEVE PAMELA D A	Director	Award	1,056	—	—	20,690
2025-03-10	REED JOANN A	Director	Award	1,056	—	—	62,940
2025-03-10	Kalathur Rajesh	President, JD Financial & CIO	Award	1,056	—	—	1,056
2025-03-10	Kalathur Rajesh	President, JD Financial & CIO	Other	171	—	—	171